WO2008066438B1 - Wear resistant tool for wood chipping - Google Patents

Wear resistant tool for wood chipping

Info

Publication number
WO2008066438B1
WO2008066438B1 PCT/SE2007/000881 SE2007000881W WO2008066438B1 WO 2008066438 B1 WO2008066438 B1 WO 2008066438B1 SE 2007000881 W SE2007000881 W SE 2007000881W WO 2008066438 B1 WO2008066438 B1 WO 2008066438B1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
steel base
cutting tool
coating
release
Prior art date
Application number
PCT/SE2007/000881
Other languages
French (fr)
Other versions
WO2008066438A8 (en
WO2008066438A1 (en
Inventor
Hakan Engqvist
Martin Engqvist
Original Assignee
E2 Forestry Hb
Hakan Engqvist
Martin Engqvist
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by E2 Forestry Hb, Hakan Engqvist, Martin Engqvist filed Critical E2 Forestry Hb
Publication of WO2008066438A1 publication Critical patent/WO2008066438A1/en
Publication of WO2008066438A8 publication Critical patent/WO2008066438A8/en
Publication of WO2008066438B1 publication Critical patent/WO2008066438B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
    • C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
    • C23C8/68—Boronising
    • C23C8/70—Boronising of ferrous surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The present invention relates to a cutting tool for (10; 20; 30; 40) for machining wood having a steel base (11; 21; 31; 41) with a predetermined material toughness. The steel base has a cutting side (13; 23; 33; 43) and release side (12; 22; 32; 42). The cutting tool comprises a diffusion gradient of an alloy substance belonging to any of the group: carbon, carbon nitride, nitride, boron and boron compounds, extending inwards from at least the surface of the cutting side (13; 23; 33; 43) to provide a material hardness of more than 850 HV. The invention is also related to a method for manufacturing a cutting tool and a wood cutting apparatus including one or more cutting tools.

Claims

AMENDED CLAIMS received by the International Bureau on 18 June 2008 (18.06.2008)
1. A cutting tool for (10; 20; 30; 40) for machining wood having a steel base (11; 21; 31; 41) with a predetermined material toughness, said steel base having a cutting side (13; 23; 33; 43) and release side (12; 22; 32; 42), said cutting tool comprises a diffusion gradient of an alloy substance belonging to any of the group: carbon, carbon nitride, nitride, boron and boron compounds, extending inwards from at least the surface of the cutting side (13; 23; 33; 43) to provide a material hardness of more than 850 HV, c h a r a c t e r i z e d i n that said steel base (11; 21; 31; 41) is provided with: a chamfered surface (25; 45) having a chamfered angle θc which is less than, or equal to, 90 degrees to the cutting side (23; 43), and an angled surface (26; 46) between the chamfered surface (25; 45) and the reveres side (24; 44) having a release angle θ of 20-50 degrees to the cutting side (23; 43), said release angle θ is smaller than said chamfered angle θc.
2. The cutting tool according to claim 1, wherein at least one coating (16, 17; 27; 48) having a material hardness of more than 850 HV, preferably more than 1000 HV, is provided on the cutting side (13; 23; 33; 43) of the steel base.
3. The cutting tool according to claim 2, wherein said coating is corrosion resistant.
4. The cutting tool according to any of claims 1-3, wherein the diffusion gradient extends inwards to a depth less than 2 mm from the surface of the cutting side.
5. The cutting tool according to any of claims 1-4, wherein said steel base have a material toughness of more than 5OJ. 14
6. A method for manufacturing a cutting tool (10; 20; 30; 40) for machining wood, said method comprising: providing a steel base (11; 21; 31; 41) with a predetermined material toughness, said steel base having a cutting side (13; 23; 33; 43) and a release side (12; 22; 32; 42), and diffusing an alloy substance belonging to any of the group: carbon, carbon nitride, nitride, boron and boron compounds, into the steel base at the surface of the cutting side (13; 23; 33; 43) to provide a material hardness of more than 850 HV c h a r a c t e r i z e d i n that said method further comprises: providing a a chamfered surface (25; 45) having a chamfered angle θc which is less than, or equal to, 90 degrees to the cutting side (23; 43), and providing an angled surface(26; 46) between the chamfered surface (25; 45) and the reveres side (24; 44) having a release angle θ of 20-50 degrees to the cutting side (23; 43), said release angle θ is smaller than said chamfered angle θc.
7. The method according to claim 6, wherein said method further comprises depositing at least one coating (16, 17; 27; 48) having a material hardness of more than 850 HV, preferably more than 1000 HV, on the cutting side (13; 23; 33; 43) of the steel base.
8. The method according to claim 7, wherein said coating provides corrosion resistance.
9. The method according to any of claims 6-8, wherein the diffusion of said alloy substance is performed to a depth less than 2 mm from the surface of the cutting side.
10. The method according to any of claims 6-9, wherein said steel base is selected to have a material toughness of more than 5OJ.
11. A wood cutting apparatus comprising one or more cutting tools as claimed in any of claims 1-5. 15
12. A cutting tool for (10; 20) for machining wood having a steel base (11; 21) with a predetermined material toughness, said steel base having a cutting side (13; 23), a reverse side (14; 24) and release side (12; 22), c h a r a c t e r i z e d i n that at least one thick film coating (16, 17; 27) having a material hardness of more than 850 HV, preferably more than 1000 HV, is provided on the cutting side (13; 23), the reverse side (14; 24) and the release side (12; 22) of said steel base, said coating is corrosion resistant.
13. The cutting tool according to claim 12, wherein said coating comprises cemented carbides with Ni or CoNi as binder phase.
14. The cutting tool according to claim 12, wherein said coating comprises hard chrome.
15. The cutting tool according to any of claims 12-14, wherein said coating has a thickness of less than 1000 micrometers.
PCT/SE2007/000881 2006-11-27 2007-10-04 Wear resistant tool for wood chipping WO2008066438A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0602507 2006-11-27
SE0602507-6 2006-11-27

Publications (3)

Publication Number Publication Date
WO2008066438A1 WO2008066438A1 (en) 2008-06-05
WO2008066438A8 WO2008066438A8 (en) 2008-08-07
WO2008066438B1 true WO2008066438B1 (en) 2008-09-25

Family

ID=39468143

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2007/000881 WO2008066438A1 (en) 2006-11-27 2007-10-04 Wear resistant tool for wood chipping

Country Status (1)

Country Link
WO (1) WO2008066438A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8894770B2 (en) * 2012-03-14 2014-11-25 Andritz Iggesund Tools Inc. Process and apparatus to treat metal surfaces

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0669681B2 (en) * 1989-03-28 1994-09-07 兼房株式会社 Wood rotary cutting blade
AT393387B (en) * 1989-10-23 1991-10-10 Boehler Gmbh COLD WORK STEEL WITH HIGH PRESSURE STRENGTH AND USE OF THIS STEEL
AT500728B8 (en) * 2005-02-21 2007-02-15 Boehler Edelstahl CUTTING TOOL

Also Published As

Publication number Publication date
WO2008066438A8 (en) 2008-08-07
WO2008066438A1 (en) 2008-06-05

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